S. 12A : Registration-Trust or institution-Details by questionnaire communicated through Electronic mode on Department’s Portal-Merely uploading of information about date of hearing on Income-Tax Portal is not effective service of notice-Notice is not served-Matter restored to Commissioner (E) to decide afresh in accordance with law after giving reasonable opportunity of being heard to assessee.[S. 12A(1)(1)(ac)(iii), 12AB, 282(1), R. 127(1)]